modiloader | f9f99bcf9542f1a914be83fb0baa3bb6a8501f266ff6cc675cd0f9cc68e987f5

Analysis

max time kernel
119s
max time network
121s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
25-12-2024 18:47

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General

Target

f9f99bcf9542f1a914be83fb0baa3bb6a8501f266ff6cc675cd0f9cc68e987f5.exe
Size

300KB
MD5

b46e42876c90eb41514d91ae51271d50
SHA1

e7e6ff1c5a9db828488349f3e3bc3ce7f118dfb7
SHA256

f9f99bcf9542f1a914be83fb0baa3bb6a8501f266ff6cc675cd0f9cc68e987f5
SHA512

8f94ebb4d57a1975b19d7b90c8965a583331c1e28547deac5f09a588ed386c9c5dfa1d8b9fa630a411e5cad4853ce6f5fdac26630cac8693e531c228d966912b
SSDEEP

3072:Ue2A0wxDqUpM5scww4chO+O1BmP5DG0sg3i4XZ9WvDZHwdRX/L+gP38GR:UsxD5cwohO+O1sVG0/pZ6iPC8v

Score

10^/10

modiloader discovery persistence trojan upx

Malware Config

Signatures

ModiLoader, DBatLoader
ModiLoader is a Delphi loader that misuses cloud services to download other malicious families.
trojan modiloader
Modiloader family
modiloader

ModiLoader Second Stage 4 IoCs

resource	yara_rule
behavioral2/memory/1740-53-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/1740-54-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/1740-52-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/1740-59-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	f9f99bcf9542f1a914be83fb0baa3bb6a8501f266ff6cc675cd0f9cc68e987f5.exe

Executes dropped EXE 3 IoCs

pid	Process
2388	csrsll.exe
544	csrsll.exe
1740	csrsll.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Win Pdf = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\csrsll.exe"	reg.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 4824 set thread context of 3964	4824	f9f99bcf9542f1a914be83fb0baa3bb6a8501f266ff6cc675cd0f9cc68e987f5.exe	82
PID 2388 set thread context of 544	2388	csrsll.exe	88
PID 2388 set thread context of 1740	2388	csrsll.exe	89

UPX packed file 13 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/3964-6-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/3964-8-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/3964-9-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/3964-10-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/3964-37-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/1740-44-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/1740-50-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/1740-53-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/1740-54-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/1740-52-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/3964-57-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/544-58-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/1740-59-0x0000000000400000-0x0000000000414000-memory.dmp	upx

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 7 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	csrsll.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	csrsll.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	csrsll.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f9f99bcf9542f1a914be83fb0baa3bb6a8501f266ff6cc675cd0f9cc68e987f5.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f9f99bcf9542f1a914be83fb0baa3bb6a8501f266ff6cc675cd0f9cc68e987f5.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe
Token: SeDebugPrivilege	544	csrsll.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
4824	f9f99bcf9542f1a914be83fb0baa3bb6a8501f266ff6cc675cd0f9cc68e987f5.exe
3964	f9f99bcf9542f1a914be83fb0baa3bb6a8501f266ff6cc675cd0f9cc68e987f5.exe
2388	csrsll.exe
544	csrsll.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 4824 wrote to memory of 3964	4824	f9f99bcf9542f1a914be83fb0baa3bb6a8501f266ff6cc675cd0f9cc68e987f5.exe	82
PID 4824 wrote to memory of 3964	4824	f9f99bcf9542f1a914be83fb0baa3bb6a8501f266ff6cc675cd0f9cc68e987f5.exe	82
PID 4824 wrote to memory of 3964	4824	f9f99bcf9542f1a914be83fb0baa3bb6a8501f266ff6cc675cd0f9cc68e987f5.exe	82
PID 4824 wrote to memory of 3964	4824	f9f99bcf9542f1a914be83fb0baa3bb6a8501f266ff6cc675cd0f9cc68e987f5.exe	82
PID 4824 wrote to memory of 3964	4824	f9f99bcf9542f1a914be83fb0baa3bb6a8501f266ff6cc675cd0f9cc68e987f5.exe	82
PID 4824 wrote to memory of 3964	4824	f9f99bcf9542f1a914be83fb0baa3bb6a8501f266ff6cc675cd0f9cc68e987f5.exe	82
PID 4824 wrote to memory of 3964	4824	f9f99bcf9542f1a914be83fb0baa3bb6a8501f266ff6cc675cd0f9cc68e987f5.exe	82
PID 4824 wrote to memory of 3964	4824	f9f99bcf9542f1a914be83fb0baa3bb6a8501f266ff6cc675cd0f9cc68e987f5.exe	82
PID 3964 wrote to memory of 4248	3964	f9f99bcf9542f1a914be83fb0baa3bb6a8501f266ff6cc675cd0f9cc68e987f5.exe	83
PID 3964 wrote to memory of 4248	3964	f9f99bcf9542f1a914be83fb0baa3bb6a8501f266ff6cc675cd0f9cc68e987f5.exe	83
PID 3964 wrote to memory of 4248	3964	f9f99bcf9542f1a914be83fb0baa3bb6a8501f266ff6cc675cd0f9cc68e987f5.exe	83
PID 4248 wrote to memory of 3196	4248	cmd.exe	86
PID 4248 wrote to memory of 3196	4248	cmd.exe	86
PID 4248 wrote to memory of 3196	4248	cmd.exe	86
PID 3964 wrote to memory of 2388	3964	f9f99bcf9542f1a914be83fb0baa3bb6a8501f266ff6cc675cd0f9cc68e987f5.exe	87
PID 3964 wrote to memory of 2388	3964	f9f99bcf9542f1a914be83fb0baa3bb6a8501f266ff6cc675cd0f9cc68e987f5.exe	87
PID 3964 wrote to memory of 2388	3964	f9f99bcf9542f1a914be83fb0baa3bb6a8501f266ff6cc675cd0f9cc68e987f5.exe	87
PID 2388 wrote to memory of 544	2388	csrsll.exe	88
PID 2388 wrote to memory of 544	2388	csrsll.exe	88
PID 2388 wrote to memory of 544	2388	csrsll.exe	88
PID 2388 wrote to memory of 544	2388	csrsll.exe	88
PID 2388 wrote to memory of 544	2388	csrsll.exe	88
PID 2388 wrote to memory of 544	2388	csrsll.exe	88
PID 2388 wrote to memory of 544	2388	csrsll.exe	88
PID 2388 wrote to memory of 544	2388	csrsll.exe	88
PID 2388 wrote to memory of 1740	2388	csrsll.exe	89
PID 2388 wrote to memory of 1740	2388	csrsll.exe	89
PID 2388 wrote to memory of 1740	2388	csrsll.exe	89
PID 2388 wrote to memory of 1740	2388	csrsll.exe	89
PID 2388 wrote to memory of 1740	2388	csrsll.exe	89
PID 2388 wrote to memory of 1740	2388	csrsll.exe	89
PID 2388 wrote to memory of 1740	2388	csrsll.exe	89
PID 2388 wrote to memory of 1740	2388	csrsll.exe	89

C:\Users\Admin\AppData\Local\Temp\f9f99bcf9542f1a914be83fb0baa3bb6a8501f266ff6cc675cd0f9cc68e987f5.exe
"C:\Users\Admin\AppData\Local\Temp\f9f99bcf9542f1a914be83fb0baa3bb6a8501f266ff6cc675cd0f9cc68e987f5.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4824
- C:\Users\Admin\AppData\Local\Temp\f9f99bcf9542f1a914be83fb0baa3bb6a8501f266ff6cc675cd0f9cc68e987f5.exe
  "C:\Users\Admin\AppData\Local\Temp\f9f99bcf9542f1a914be83fb0baa3bb6a8501f266ff6cc675cd0f9cc68e987f5.exe"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3964
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\YFGDL.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4248
  - - C:\Windows\SysWOW64\reg.exe
      REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /v "Win Pdf" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe" /f
      4⤵
      Adds Run key to start application
      System Location Discovery: System Language Discovery
      PID:3196
- - C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe
    "C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2388
  - - C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe
      "C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      PID:544
  - - C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe
      "C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      PID:1740

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\YFGDL.txt

Filesize
145B

MD5
4eb61ec7816c34ec8c125acadc57ec1b

SHA1
b0015cc865c0bb1a027be663027d3829401a31cc

SHA256
08375cdb2e9819391f67f71e9718c15b48d3eaa452c54bd8fdd1f6a42e899aff

SHA512
f289f01d996dd643560370be8cdf8894e9a676ca3813f706c01ef5d705b9b18246c6cadf10d96edd433a616637b8a78fbd23c5738e76f1c4e671977b6d0cb6c1

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe

Filesize
300KB

MD5
6ea77a2e77d912a966aa0087a7a58667

SHA1
5b37f3a181f1d51cad270b216c8dd68466d48766

SHA256
54fb6915461086a554a0cd72ded6c19fd4567663155a51e7cb16ab70d251a2ec

SHA512
c85e5b7317b88cba17bd538bfd99b0f5abe48801129d39b75b9988ef1211d0ec2a09c0603b6f654585d28e50f80405bbbfd6c2a6460f6ade5f698b75ae3b9875

Download Submit
memory/544-58-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1740-59-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1740-52-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1740-54-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1740-53-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1740-50-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1740-44-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2388-38-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/2388-39-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/2388-51-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/3964-37-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/3964-10-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/3964-9-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/3964-8-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/3964-6-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/3964-57-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4824-0-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/4824-5-0x0000000002320000-0x0000000002322000-memory.dmp

Filesize
8KB

Download
memory/4824-4-0x0000000002300000-0x0000000002302000-memory.dmp

Filesize
8KB

Download
memory/4824-3-0x00000000022F0000-0x00000000022F2000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads